Microviscosity dependence of the Raman band shape of methyl-isobutyl ketone

Abstract

Abstract The Raman band shape analysis of the CO stretching mode of vibration of methyl-isobutyl ketone in solution phase reveals that macroscopic consideration of hydrodynamic force is not sufficient to correlate the vibrational relaxation rate (τ v −1 ) with parameter ƒ(ϱ, η, n ), involving dynamic viscosity (η). The band shape analysis was therefore attempted taking the microscopic parameter, microviscosity (η m ) into account through a modified parameter ƒ m . The correlation of τ v −1 with ƒ m is reported.